mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +00:00
f05b45fdb2
DWARF discriminators are used to distinguish multiple control flow paths on the same source location. When this happens, instructions across basic block boundaries will share the same debug location. This pass detects this situation and creates a new lexical scope to one of the two instructions. This lexical scope is a child scope of the original and contains a new discriminator value. This discriminator is then picked up from MCObjectStreamer::EmitDwarfLocDirective to be written on the object file. This fixes http://llvm.org/bugs/show_bug.cgi?id=18270. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202752 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
3.7 KiB
LLVM
83 lines
3.7 KiB
LLVM
; RUN: opt < %s -add-discriminators -S | FileCheck %s
|
|
|
|
; Test that the only instructions that receive a new discriminator in
|
|
; the block 'if.then' are those that share the same line number as
|
|
; the branch in 'entry'.
|
|
;
|
|
; Original code:
|
|
;
|
|
; void foo(int i) {
|
|
; int x, y;
|
|
; if (i < 10) { x = i;
|
|
; y = -i;
|
|
; }
|
|
; }
|
|
|
|
define void @foo(i32 %i) #0 {
|
|
entry:
|
|
%i.addr = alloca i32, align 4
|
|
%x = alloca i32, align 4
|
|
%y = alloca i32, align 4
|
|
store i32 %i, i32* %i.addr, align 4
|
|
%0 = load i32* %i.addr, align 4, !dbg !10
|
|
%cmp = icmp slt i32 %0, 10, !dbg !10
|
|
br i1 %cmp, label %if.then, label %if.end, !dbg !10
|
|
|
|
if.then: ; preds = %entry
|
|
%1 = load i32* %i.addr, align 4, !dbg !12
|
|
store i32 %1, i32* %x, align 4, !dbg !12
|
|
|
|
%2 = load i32* %i.addr, align 4, !dbg !14
|
|
; CHECK: %2 = load i32* %i.addr, align 4, !dbg !15
|
|
|
|
%sub = sub nsw i32 0, %2, !dbg !14
|
|
; CHECK: %sub = sub nsw i32 0, %2, !dbg !15
|
|
|
|
store i32 %sub, i32* %y, align 4, !dbg !14
|
|
; CHECK: store i32 %sub, i32* %y, align 4, !dbg !15
|
|
|
|
br label %if.end, !dbg !15
|
|
; CHECK: br label %if.end, !dbg !16
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void, !dbg !16
|
|
; CHECK: ret void, !dbg !17
|
|
}
|
|
|
|
attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!7, !8}
|
|
!llvm.ident = !{!9}
|
|
|
|
!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.5 (trunk 199750) (llvm/trunk 199751)", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [first-only.c] [DW_LANG_C99]
|
|
!1 = metadata !{metadata !"first-only.c", metadata !"."}
|
|
!2 = metadata !{i32 0}
|
|
!3 = metadata !{metadata !4}
|
|
!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"foo", metadata !"foo", metadata !"", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (i32)* @foo, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [foo]
|
|
!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [first-only.c]
|
|
!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !2, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
|
|
!7 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
|
|
!8 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
|
|
!9 = metadata !{metadata !"clang version 3.5 (trunk 199750) (llvm/trunk 199751)"}
|
|
!10 = metadata !{i32 3, i32 0, metadata !11, null}
|
|
|
|
!11 = metadata !{i32 786443, metadata !1, metadata !4, i32 3, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [first-only.c]
|
|
; CHECK: !11 = metadata !{i32 786443, metadata !1, metadata !4, i32 3, i32 0, i32 0}
|
|
|
|
!12 = metadata !{i32 3, i32 0, metadata !13, null}
|
|
|
|
!13 = metadata !{i32 786443, metadata !1, metadata !11, i32 3, i32 0, i32 1} ; [ DW_TAG_lexical_block ] [first-only.c]
|
|
; CHECK: !13 = metadata !{i32 786443, metadata !1, metadata !14, i32 3, i32 0, i32 1, i32 0} ; [ DW_TAG_lexical_block ] [./first-only.c]
|
|
|
|
!14 = metadata !{i32 4, i32 0, metadata !13, null}
|
|
; CHECK: !14 = metadata !{i32 786443, metadata !1, metadata !11, i32 3, i32 0, i32 1}
|
|
|
|
!15 = metadata !{i32 5, i32 0, metadata !13, null}
|
|
; CHECK: !15 = metadata !{i32 4, i32 0, metadata !14, null}
|
|
|
|
!16 = metadata !{i32 6, i32 0, metadata !4, null}
|
|
; CHECK: !16 = metadata !{i32 5, i32 0, metadata !14, null}
|
|
; CHECK: !17 = metadata !{i32 6, i32 0, metadata !4, null}
|
|
|